A and B on a 6400M

Hi Bob, The 6400(M) has two independent receivers (slices) that share a common antenna. So, just as you did with split operation, you can listen to two receivers (same or different bands) simultaneously. When I want to see if there is any 6 or 10 meter activity, I choose a profile that I created called "10 and 6". I have two panadapters open with 10 meters on one and 6 meters on the other. Since my beam works on 20 - 6 meters, I get good reception on the two bands simultaneously and can quickly see if either or both bands are open.

Another technique that I frequently use during Field Day is to have one slice on the phone segment of a band and the other on CW. That makes it easier to transition back and forth by simply turning on TX for the mode I intend to move to and mute/unmute the appropriate slices. Much easier (and quicker) to do than to explain...

Another thing that I do with two slices since I got a 2 meter transverter, is to set one slice on the repeater output frequency with the normal repeater options set. I put the other slice in simplex mode and set it to the repeater input frequency. Now when there is a station trying to check into our club net but can't hit the repeater, I can often unmute the input frequency and relay them in. If I can't hear them on the input, then this doesn't help.

A feature that I don't often use myself, but is an amazing thing is to use MultiFlex. This requires V3 of the software. V1 and V2 do not support this. With MultiFlex, you can have two operators independently listening to their respective slice, unaffected by the other. So if you are at your QTH listening on one slice, a friend could be remotely logged in and listen on a second slice. The limitation of the 6400 is that it only has one Spectral Capture Unit (SCU), so both slices share the antenna, RF Gain and Wide Noise Blanker settings.

Since the Flex 6000 radios only have one transmitter, you need to coordinate transmitter usage if two people are operating simultaneously using MultiFlex. This is most often done in multi-operator, single transmitter contesting. One operator is on the "run" frequency, while the other searches for multipliers. Good coordination and communication are necessary between operators for this to be manageable.

I hope that gives you a few ideas. Since I am a "one thing at a time" kind of operator, I don't use two slices concurrently very often, except for split operation and the cases discussed above.